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This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
MR. ROBT. B. HAYWARD has written to me that some of the statements in my article, “The Axioms of Geometry,” in NATURE, March 13 (p. 453), are too sweeping, and that in particular Euclid I. 16 does not ...
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